meta: qt4: fix postprocessing of pkg-config files

meta: qt4: fix postprocessing of pkg-config files

When building qt4-embedded the generated and cleaned pkg-config files for qt are wrong.
The Cflags variable contains something like ${includedir}/qtopia/QtCore where
${includedir} is already /usr/include/qtopia/QtCore.

This patch reverts the fix up of the Cflags variable implemented in do_install.

(From OE-Core rev: b40b9c024be5e1ec81a31961158b3e6b529acfe0)

Signed-off-by: Simon Busch <morphis@gravedo.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>